1. A New Grid Bar Design for a Modified Cylinder Cleaner Sanh Le, Ph. D. U. S. Cotton Research Unit Stoneville, MS

2. Objective Design a seed-cotton and lint cleaner that: – is non aggressive – preserves fiber properties – yields high turnout – cleans efficiently Evaluate two seed-cotton packing methods

3. Test Method Test 1 –3 cleaner treatments –2 varieties –2 packing methods

4. Ginning sequence

5. 45 degrees 1 in. 0.5 in. Chisel-shape grid bar Gap between bars: narrow (0.25 in.) or wide (0.375 in.)

6. FC CC SM, TM MCC or SLC Condenser, baler EFGS FC MCC SM, TM MCC or SLC Condenser, baler EFGS Test 1Test 2 Step 1: seed cleaning Step 2: lint cleaning NFCC NCCC WCCC NCHCC WCHCC

7. Cleaner treatments 1.Hybrid lint cleaner* with wide gap chisel- shape grid bars (WCHLC) 2.Hybrid lint cleaner with narrow gap chisel- shape grid bars (NCHLC) 3.Saw-type lint cleaner (SLC) *Six-cylinder cleaner + saw-type lint cleaner with one grid bar

8. Varieties Hairy-leaf variety (STV4892) Smooth-leaf variety (DPL555)

9. Packing methods By hand Suction pipe

10. Experiment Split plot with cleaner treatments as the main unit. 30 runs with 3 replications

11. Test 2: 2 steps Step 1: seed-cotton cleaning 3 Seed cotton cleaning treatments Step 2: lint cleaning 3 lint cleaning treatments (same as Test 1) ------------------------------------------------------ 2 varieties 2 packing methods

12. FC CC SM, TM MCC or SLC Condenser, baler EFGS FC MCC SM, TM MCC or SLC Condenser, baler EFGS Test 1Test 2 Step 1: seed cleaning Step 2: lint cleaning NFCC NCCC WCCC NCHCC WCHCC

13. Seed-cotton cleaner treatments 1.Modified cylinder cleaner with narrow gaps and flat, square grid bars (NFCC) 2.Modified cylinder cleaner with narrow gaps and chisel-shape grid bars (NCCC) 3.Modified cylinder cleaner with wide gaps and chisel-shape grid bars (WCCC)

14. Results Source of variance ReflectanceYellownessLeaf gradeTrash area, %Uniformity,% Cleaner treatment: NCHLC 75.1b8.53.2 a0.040b81.2 SLC 76.1a8.63.0 b0.035c81.1 WCHLC 75.3b8.53.3 a0.046a81.3 Varieties: STV4892 73.9b9.0a3.4 a0.043 a82.0a DPL555 77.1a8.0b3.0 b0.038 b80.4b Test 1, HVI

15. Source of varianceNeps/gSeed coat neps/gDust/g Visible foreign matter, % Lint cleaner treatments: NCHLC 289.2a12.7387.1ab1.79a SLC260.8c11.6342.4b1.31b WCHLC275.3b12.1412.7a1.95a Cultivar :STV4892206.0b14.4a403.01.79a DPL555344.2a9.9b358.51.57b Packing : Hand271.0b12.5375.31.69 Pipe279.2a11.8386.11.67 Test 1, AFIS

16. Source of variance Upper quartile length(w), cm Short fiber content(w), % Fineness, mTex Maturity ratio, % Lint cleaner treatments: NCHLC 2.908.48167.80.869 SLC2.908.41167.90.870 WCHLC2.908.42167.80.869 Cultivar : STV48922.92a7.23b179.3a0.892a DPL5552.88b9.64a156.4b0.846b Packing : Hand2.908.51168.30.870 Pipe2.908.36167.40.869 Test 1, AFIS

17. Seed-cotton cleaning Source of variance Strength, g/texReflectanceLeaf gradeLength, cm Seed-cotton treatments: NFCC 28.0b75.2a3.7a2.76 b NCCC28.5a75.0ab3.6a2.76b WCCC28.2ab74.8b3.4b2.77a Test 2, HVI

18. MicronaireReflectanceYellownessLeaf gradeTrash area, % Lint cleaner treatments: NCHLC 4.474.8b8.6a3.6a0.047b SLC4.475.5a8.7a3.4b0.039c WCHLC 4.474.7b8.5b3.7a0.056a Cultivars: STV48924.3a74.0b8.9a3.7a0.049 DPL5554.4b76.0a8.3b3.4b0.046 Packing : Hand4.4a75.3a8.63.50.047 Pipe4.4b74.7b8.63.60.047 Test 2, HVI

19. Source of variance Short fiber content(w), % Fineness, mTex Maturity ratio, % Seed-cotton treatments: NFCC8.00167.90.872 NCCC7.97167.80.872 WCCC8.17166.80.868 Lint cleaner treatments: NCHLC8.09167.60.871 SLC8.02167.00.870 WCHLC8.07168.00.872 Cultivar:STV48926.95b178.3a0.892a DPL5559.15a156.8b0.850b Packing: Hand8.11167.70.872 Pipe7.99167.40.870 Test 2, AFIS

20. Source of varianceNeps/gSeed coat neps/gDust/g Visible foreign matter, % Seed-cotton treatments: NFCC 248.6b12.0401.81.83 NCCC253.8ab12.9412.91.86 WCCC262.5a13.1399.21.90 Lint cleaner treatments: NCHLC 260.0a13.0ab423.9ab1.95b SLC245.2b11.7b352.1b1.55c WCHLC262.8a13.4a438.0a2.09a Cultivar: STV4892205.2b15.3a417.12.06 DPL555304.2a10.1b392.11.67 Packing: Hand249.2b12.7401.41.87 Pipe260.7a12.6407.91.86 Test 2, AFIS

21. Source of variance Lint turnout, % Cleaner waste, kg/bale Cleaning efficiency, % Based on visible waste (Shirley Analyzer) Lint cleaner treatments: NCHLC 38.3a3.53b34.3b SLC37.5b7.97a47.3a WCHLC38.0ab3.27b30.8b Cultivar: STV489237.7b4.34b37.1 DPL55538.2a5.51a37.9 Packing : Hand38.15.05a39.6 Pipe37.84.79b35.4 Test 1

22. Cleaned lint in waste, %Visible waste in waste, % Lint cleaner treatments: NCHLC21.3c75.9a SLC47.6a51.1c WCHLC27.3b70.6b Cultivar: STV489231.0b67.0a DPL55533.1a64.8b Packing : Hand32.765.2 Pipe31.466.5 Test 1

23. Source of variance Lint turnout, % Cleaner waste, kg/bale Cleaning efficiency, % Based on visible waste (Shirley Analyzer) Seed cotton treatments: NFCC39.574.659.80c w NCCC39.594.6918.9b WCCC39.654.5926.8a Lint cleaner treatments: NCHLC 40.0a3.16b28.7b SLC39.0b7.59a52.5a WCHLC39.8a3.19b27.8b Cultivar : STV489239.464.5634.81a DPL55539.754.7337.89b Packing : Hand39.694.6637.48a Pipe39.524.6335.22b Test 2

24. Cleaned lint in waste, %Visible waste in waste, % Seed cotton treatments: NFCC31.367.2 NCCC31.063.2 WCCC32.165.7 Lint cleaner treatments: NCHLC22.3b74.9a SLC44.4a54.1c WCHLC27.7b67.1b Packing : Hand31.167.3a Pipe31.863.5b Test 2

28. Conclusion Chisel-shape grid bars clean seed cotton more efficiently than flat, square grid bars Hybrid lint cleaners – Yield higher turnout (14.3 lb/bale), without compromising classer’s grade –Loss less fiber in waste (50% of SLC) –Provide similar fiber quality, except neps, seed coat neps and cleaning efficiency

29. Variety effects Smooth-leaf variety –Is easier to clean (low VFM) –Had higher fiber strength, reflectance, neps and short fiber content –Had lower seed coat neps, fiber length, fineness and maturity ratio

30. Seed-cotton packing methods No difference in trash level resulted from packing methods Hand packed method had higher mike, cleaning efficiency and visible waste in waste Packing methods did not affect fiber properties, except –Hand packed seed cotton was higher in reflectance and lower in neps